JPS62161420A - Continuous extruding device - Google Patents

Abstract

PURPOSE:To improve a sealing effect and to extend the service life of a device by providing a recessed part zone on the peripheral side of the material extruding port on the inner peripheral face of a shoe and by arranging the resisting means for preventing the pushing out of a material on the recessed part zone thereof. CONSTITUTION:A shoe 3 is arranged by approaching to the outer peripheral face 21 of a wheel 2 and the shoe inserting part 5 is provided along the groove 4 of the wheel 2. The recessed part zone 9 which fells the material is formed on the small gap zone 12 between the wheel 2 and shoe 3 around a materials extruding port 6 and the resisting means of a concentric fine slit and the like is provided on the inner face of the recessed part zone 9 as well. The material 14 flowed in from the groove 4 by the rotation of the wheel 2 is filled in the recessed part zone 9, increasing the pushing out resistance of the material as well as the resisting means of a slit and the like. In this way, the sealing effect of the material is improved and the contact of the show 3 is prevented, so the wear of the device is eliminated and the life is extended.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industry - Field of Application> The present invention provides aluminum 1. The present invention relates to an apparatus for continuously extruding materials such as copper, lead, zinc, magnesium, etc. to continuously manufacture long products such as wire rods and pipe materials, and particularly relates to a continuous extrusion apparatus using a conform method.

<Prior Art> In addition to conventional applications such as rectangular wires and sector-shaped conductors, there is a new demand for optical fiber protective spacers and the like in the electric wire industry for the use of small long aluminum materials and small diameter vibrators. Even for general short products, production efficiency is often better for long products in the pre-processing process. However, in the conventional direct extrusion method,
Since the length and weight of the billet (material) are limited by the size of the billet (material), production efficiency is poor and it may not be possible to realize this method in some cases.

Therefore, instead of the direct extrusion method, the conform method was used to extrude wire rods, etc., and a conform extruder was also invented for this purpose.
No. 31859, JP-A No. 49-65369, pm? The structure of this conform extruder, which is already known and disclosed in Publication No. 59-50410, will be briefly explained.

The conform extruder has a rotating wheel having an endless groove on its outer circumferential surface, and a shoe fixed to a part of the outer circumferential surface of the wheel so as to closely face each other. ), and further includes a protruding receptacle portion that closes one end of the passageway, and a material extrusion port (second passageway) in the shoe that communicates with the passageway and houses a die.

The principle of extruding materials in such a conform extruder will be explained based on FIG. 12.

The rotating wheel 2 has an endless groove 4 whose cross section is approximately U-shaped.
The inner peripheral surface 31 of the shoe 3 faces the open side of the groove 4, and the groove 4 and the inner peripheral surface 31 of the shoe form a passage l! is formed.

A material 14 is forcibly fed into the passage 11.

The material 14 is in contact with the shoe 3 on one surface (shoe inner circumferential surface 31), while it is in contact with the endless groove 4 on three surfaces (groove inner wall surfaces 41, 42, 43).

Therefore, the contact friction resistance on each contact surface is three times greater on the endless groove 4 side than on the shoe 3 side. At this point, the shoe 3 is fixed and the rotary wheel 2 is rotated. For example, if the wheel 2 is rotated in the direction of the arrow in FIG. sent to.

The material extrusion port has a die at the tip of the passage II ahead of it (
(not shown) is provided, the material is extruded from this and becomes a product such as a wire rod or tube material of a desired shape.

In a conform extruder with such a structure, when inserting the material into the first passage ll, it is necessary to perform a seal to prevent the material from protruding from between the shoe and the rotating wheel. A modified version of the conventional conform extruder is used.

For example, a continuous extruder manufactured by Sumitomo Heavy Industries, Ltd. employs a seal structure shown in FIGS. 8 to 10. That is, as shown in these figures, the shoe 3 is provided with a shoe insert portion 5 that is inserted into the endless groove 4 of the wheel, and the gap distance 11d between the shoe inner peripheral surface 31 and the wheel outer peripheral surface 21 is equal to the second passage 6. (Material extrusion space, hereinafter referred to as "material extrusion port 6")
The gap between the inner circumferential surface 31 of the shoe and the outer circumferential surface 21 of the wheel becomes extremely small in the vicinity of the material extrusion port 6, as shown in FIG. 1O.

With this configuration, material can be extruded using the material extrusion port 6 or die 7 with a cross-sectional dimension wider than the width of the groove 4 (approximately equal to the width of the insert part), and the strength of the shoe insert part 5 can also be increased. Sufficient capacity can be secured.

However, in a material extruder with such a configuration, the gap distance fi
Depending on the setting of d, for example, when the rotating wheel 2 thermally expands, the wheel 2 and the shoe 3 come into contact and generate more heat.
Moreover, these tools wear out, shortening the life of the machine.

Furthermore, in order to achieve sufficient sealing, it is necessary to widen the area where the gap distance d is small, which also has the disadvantage of increasing the loss of driving force.

Further, as another structure of the continuous extruder, a typical structure example of one for which the present applicant has already applied for a patent is shown in FIG. In the example shown in the figure, in order to increase the diameter of the material extrusion port 6, the rotary wheel 2 has a groove 4 for the material conveyance path and a groove 44 on which the wide shoe insert portion 5° is inserted.
are provided in two stages, and the side surface of the shoe insert part 5° and the groove 4
The gap distance @d' with the side surface of 4 is made small, and the material is sealed in this portion.

However, even in an extruder with such a configuration, material accumulates between the lower end surface 51° of the shoe insert part 5° and the bottom surface of the groove 44 (this part does not have a sealing effect), causing the wheel 2 and the shoe to There is a problem in that a large frictional force acts between the two wheels, increasing the required driving force and increasing the temperature of the wheels etc. due to the friction.

Furthermore, since the shoe insert part 5' receives the internal pressure of the material in the direction of the arrow 17 in FIG. Since the 5° width must be sufficiently large, the cause of the friction cannot be eliminated by narrowing the area where the material accumulates, and the problem cannot be solved from a design standpoint.

<Problems to be Solved by the Invention> An object of the present invention is to solve the above-mentioned drawbacks of the prior art and provide a structure that can reliably seal the material between the rotating wheel and the shoe, and which The object of the present invention is to provide a continuous extrusion device that causes less loss and can extend the life of the tool.

Means to solve problems〉 Such objects are achieved by the present invention as described below.

That is, the present invention includes a rotary wheel having an endless groove formed on its outer circumferential surface, a shoe fixedly installed in close proximity to and facing a part of the outer circumferential surface of the rotary wheel, and the groove and the inner circumferential surface of the shoe. 7gi passage for material conveyance, and an abutment (protruding receiver part) that blocks one end of the first passage.
and a die for extruding the material into a desired shape, which is disposed in the shoe and located in the middle of a second passage communicating with the first passage, wherein the second passage on the inner peripheral surface of the shoe The present invention provides a continuous extrusion device characterized in that a concave region is provided around the passage.

Further, the present invention includes a rotating wheel having an endless groove formed on its outer circumferential surface, a shoe fixedly installed to closely face a part of the outer circumferential surface of the rotating wheel, and the groove and the inner circumferential surface of the shoe. a first passageway for conveying material; an abutment (protruding receiver) that closes one end of the first passageway; a second passageway provided on the shoe and communicating with the first passageway;
In a continuous extrusion device having a die disposed in the middle of a passage for extruding material into a desired shape, a recessed area is provided around the second passage on the inner circumferential surface of the shoe, and the material is extruded into the recessed area. The present invention provides a continuous extrusion device characterized in that it is provided with a resistance means for prevention.

EMBODIMENT OF THE INVENTION Hereinafter, preferred embodiments of the continuous extrusion apparatus of the present invention shown in the accompanying drawings will be described in detail.

FIG. 1 is a side view of the continuous extrusion device 1 of the present invention, and FIGS. 2 and 3 are the II-■ line and m-
It is a sectional view taken along the m line.

As shown in FIGS. 1 to 3, the rotary wheel 2 of the continuous extrusion device 1 has endless grooves 4 formed on its outer peripheral surface 21. As shown in FIGS. The cross-sectional shape of this groove 4 is usually U-shaped, but the present invention is not limited to this.

On the other hand, the shoe 3 has an inner circumferential surface 31 that corresponds to the outer circumferential surface 21 of the rotating wheel 2, that is, an inner circumferential surface 31 having approximately the same curvature, and is fixedly installed so that the inner circumferential surface 31 closely faces a part of the outer circumferential surface 21 of the rotating wheel. has been done.

As shown in FIGS. 1 and 2, the shoe 3 has a shoe insert portion 5 protruding along the inner peripheral surface 31 so as to correspond to the groove 4.
It is inserted to a certain depth. The gap distance @d between the inner circumferential surface 31 of the shoe and the outer circumferential surface 21 of the rotating wheel is the distance between the material supply port 10 and the second passage (material extrusion port) 6 which is the material extrusion space.
The gap distance @d gradually decreases toward the inlet of the material extrusion port 6, and as will be described later, the gap distance @d becomes a supplementary value near the material extrusion port 6.

Therefore, while the height of the shoe insert part 5 is kept constant, the depth at which the shoe insert part 5 is inserted into the groove 4 is gradually deepened from the material supply port 10 toward the material extrusion port 6, or the height of the shoe insert part 5 is By gradually reducing the height, the depth at which the shoe insert portion 5 is inserted into the groove 4 can be made constant.

In this way, the first passage 11 for conveying the material 14 is formed in the space surrounded by the groove 4 of the rotating wheel and the shoe insert part 5, and the material 14 is transferred to the material supply port as the rotating turtle wheel 2 rotates. It is continuously supplied from the IO, passes through the first passage 11, and is extruded into a desired shape from a material extrusion port 6, which will be described later, through a die 7.

Examples of the material 14 used in the continuous extrusion device 1 of the present invention include wire rods of aluminum, copper, lead, zinc, magnesium, etc., or powders thereof. In this specification, a metal wire typically having a circular cross section will be described.

Note that it is not always necessary to provide the shoe insert portion 5 on the shoe inner circumferential surface 31;
The first passage 11 may be formed by the groove 4 and the groove 4 .

As shown in FIGS. 1 and 3, the shoe 3 has a first
At the downstream end of the passage 11, there is provided a material extrusion port 6 that communicates with the passage 11, and a protruding receiver portion having a cross section that is approximately the same as the groove 4 called an abutment 8 that blocks the first passage 11 is provided in the vicinity thereof. . As a result, the material flowing through the first passage 11 engages with the abutment 8, changes the direction of its flow, and is guided to the material extrusion port 6.

A die 7 is built into the material extrusion port 6, and the material is extruded into a predetermined shape by passing through the hole 71 of the die 7. Therefore, by appropriately selecting the shape of the hole 71 of the die, it is possible to extrude the material as a solid wire material or a hollow pipe material having a circular, oval, rectangular, triangular, fan-shaped cross section, for example.

The direction of the material extrusion port (second passage) 6 is possible in the range from tangential direction of the rotating wheel 2 (horizontal to the first passage 11) to radial direction (perpendicular to the first passage 11), but due to the layout, It is preferable to provide it in the radial direction of the rotating wheel 2 and push out the material in this direction because it is convenient for handling.

In such a continuous extrusion device 1, the first passage 11 is not completely closed, and there is a gap between the rotating wheel 2 and the shoe 3, so it is necessary to seal it so that the material does not protrude from this gap. There is. Particularly in the vicinity of the material extrusion port 6, the internal pressure of the material is high, so as shown in FIGS. 12 is provided to seal the material.

Furthermore, as the most important feature of the present invention, a concave region 9 is provided around the entrance of the material extrusion port (second passage) 6 in the minimal gap distance region 12. By providing this concave region 9, the material fills in the concave region 9, increasing the protrusion resistance, increasing the sealing effect between the rotating wheel outer circumferential surface 21 and the shoe inner circumferential surface 31, and preventing the occurrence of paris. Decrease.

Since a separating force acts between the rotary wheel 2 and the shoe 3 due to the internal pressure of the material filling the roughly concave region 9, the shoe inner circumferential surface 31 and the rotary wheel outer circumferential surface 21 come into contact within the minimum gap distance region 12. Therefore, heat generation due to friction between these tools, loss of driving force, and wear of the tools can be avoided.

Furthermore, in the present invention, a resistance means is provided in the recessed region 9 to further increase the resistance to the protrusion of the material, thereby further enhancing the above-mentioned effects.

Here, as a resistance means for preventing the material from protruding, the fourth
As shown in the figure, a narrow groove 13 extending approximately concentrically from the entrance of the material extrusion port 6 is suitable. However, the present invention is not limited to this, and may include thin grooves, wavy irregularities, or point-like protrusions whose arrangement is different from that in FIG.
Any material may be used as long as it can produce similar effects.

Note that there is a suitable range for the dimensions of the recessed region 9. That is, as shown in FIG.
It is preferable that L/D≧6.

This is because by setting the dimensions in such a range, the resistance when the material protrudes increases, and the above-mentioned effects are further enhanced.

The loss of driving force is equal to the area of the recessed region 9 multiplied by the shear deformation stress of the material. Therefore, if the area of the recessed region 9 is too large, the loss of driving force will be large. Furthermore, if the area of the recessed region 9 is too small, the above-mentioned effects will not be sufficiently exhibited.
In particular, the amount generated in Paris will be large.

Therefore, it is desirable that the area of the recessed region 9 be determined in consideration of the above points.

For Kusaku Hereinafter, the operation of the continuous extrusion device of the present invention will be explained.

As shown in FIG. 1, the material 14 is tightly fitted into the endless groove 4 of the rotating wheel 2 at the material supply port 10, and when the rotating wheel 2 rotates in the direction of the arrow in the figure, the material 14 is transferred to the first passage. 11 is continuously supplied.

The state of the material 14 within the first passage 11 will be explained. FIG. 5 schematically shows the deformed state of the material 14 in the passage, and FIGS. 6 and 7 are the lines ■ to ■ in FIG.
■It is a cross-sectional view along line.

The state of deformation of the material 14 is different between the first-half region 15 and the second-half region 16 of the first passage. That is, in the first half area 15, the sixth
As shown in the figure, the material 14 is in partial contact with the groove inner wall surfaces 41, 42. The material 14 is gradually plastically deformed due to the frictional force generated, and the groove 4 is filled with the material 14 . In the latter half region, as shown in FIG. 7, the material 14 fills the groove 4 and the material and the inner wall surface of the groove come into contact with each other under strong pressure, so that extrusion pressure is generated by the force due to the shear deformation resistance of the material.

Since the downstream end of the first passage 11 is blocked by the abutment 8, the material 14 flowing through the first passage 11 engages with this abutment 8 and changes its direction of flow.
The material is guided to the material extrusion port 6.

A die 7 is built in the material extrusion port 6, and the material I
4 passes through the hole 71 of this die 7 and is squeezed out.
Products with a cross-sectional shape equal to the shape of 1 are continuously extruded. This product is cooled, wound up into a coil, etc., and held.

Since the internal pressure of the material 14 is particularly high around the material extrusion port 6,
A region 12 is provided in which the gap distance d between the shoe inner circumferential surface 31 and the rotary wheel outer circumferential surface 21 is minimized to ensure material sealing. Further, in the present invention, a recessed region 9 is provided around the material extrusion port 6 within this minimum gap distance region 12, and this recessed region 9 is filled with the material 14. This increases the material's protrusion resistance and enhances the H sealing effect.
The occurrence of Paris is reduced.

Further, due to the internal pressure of the material filled in the recessed region 9, a separating force acts between the rotating wheel 2 and the shoe 3, preventing contact between the rotating wheel outer circumferential surface 21 and the shoe inner circumferential surface 31. Avoids heat generation, loss of driving force, and tool wear due to friction between two tools.

When a resistance means such as a thin groove 13 is provided in the concave region 9, the material 14 gets caught in the fine unevenness,
Since the protrusion resistance further increases, the above-mentioned effects are further enhanced.

<Effects of the Invention> According to the continuous extrusion device of the present invention, by providing a concave region on the inner peripheral surface of the shoe around the material extrusion port (second passage),
The material fills the recessed region, increasing the resistance to the material's protrusion and enhancing the sealing effect between the rotating wheel and the shoe.
The occurrence of Paris is reduced.

Furthermore, due to the internal pressure of the material filled in the recessed area, a separating force acts between the rotating wheel and the shoe, preventing contact between the rotating wheel and the shoe, thereby reducing heat generation due to friction between these tools and driving force. loss of equipment and wear of tools can be avoided, extending the life of the equipment. In particular, when a resistance means for preventing the material from protruding is provided in the recessed region, the resistance to the material from protruding further increases, and the above-mentioned effect becomes remarkable.

[Brief explanation of drawings]

FIG. 1 is a partial side view of the continuous extrusion apparatus of the present invention. 2 and 3 are cross-sectional views taken along line U-II and line ■-■ in FIG. 1, respectively. FIG. 4 is a side view showing the structure of the shoe near the material extrusion port (second passage). FIG. 5 is a schematic diagram showing the state of deformation of the material within the passage. 6 and 7 are cross-sectional views taken along the VT-Vl line and the ■-■ line in FIG. 5, respectively. FIG. 8 is a partial side view of a conventional continuous extruder. FIGS. 9 and 10 are cross-sectional views taken along the ■-■ line and the X-X line in FIG. 8, respectively. FIG. 11 is a partial cross-sectional view of the vicinity of the material extrusion port of another configuration example of a conventional continuous extruder. FIG. 12 is a perspective view illustrating the principle of material extrusion in a general conform extruder. Explanation of symbols 1... Continuous extrusion device, 2... Rotating wheel, 21.
...Rotating wheel outer circumferential surface, 3...Shoe, 31...
Shoe inner peripheral surface, 4... Endless groove, 41.42.4
3--Groove inner wall surface, 5.5°...Shoe insert part, 51.51"...Shoe insert lower end surface, 6...
・Material extrusion port (second passage), 7...Dice, 71--hole, 8...abutment (protrusion receiver), 9...recess area, 10--material supply port, 11 ...1st aisle, 1
2... Minimum gap distance region, 13... Groove, 14...
- Material, 15... Passage first half area, 16... Passage second half area, 1
7... Material internal pressure direction FfG, 1 FIG, 2 FIG, 4 FIG, 5

Claims (5)

[Claims] (1) A material formed by a rotating wheel having an endless groove formed on its outer circumferential surface, a shoe fixedly installed in close proximity to a part of the outer circumferential surface of the rotating wheel, and the groove and the inner circumferential surface of the shoe. A first passage for conveyance, an abutment (protruding receiving part) that closes one end of the first passage, and a material disposed in the middle of a second passage provided in the shoe and communicating with the first passage. A continuous extrusion device comprising a die for extruding into a desired shape, characterized in that a concave region is provided around the second passage on the inner peripheral surface of the shoe. (2) The recessed region satisfies the relationship L/D≧6, where L is the width and D is the depth D.
Continuous extrusion equipment as described in section. (3) A material formed by a rotating wheel having an endless groove formed on its outer circumferential surface, a shoe fixedly installed close to and facing a part of the outer circumferential surface of the rotating wheel, and the groove and the inner circumferential surface of the shoe. A first passage for conveyance, an abutment (protruding receiving part) that closes one end of the first passage, and a material disposed in the middle of a second passage provided in the shoe and communicating with the first passage. In a continuous extrusion device having a die for extruding into a desired shape, a recessed region is provided around the second passage on the inner circumferential surface of the shoe, and a resistance means for preventing material from protruding is provided in the recessed region. Features continuous extrusion equipment. (4) The continuous extrusion device according to claim 3, wherein the concave region satisfies the relationship L/D≧6, where L is the width and D is the depth. (5) The continuous extrusion device according to claim 3 or 4, wherein the resistance means is a groove extending around the second passage.